Granted Patent
Utility
US 5,323,621 · App. 08/023,086
Gas defrost system
Inventors:
Elmer J. Subera, Michael J. Schuetter
Patented Case
View Patent ↗
Granted: Jun 28, 1994
Filed: Feb 26, 1993
Inventors
Elmer J. Subera
Michael J. Schuetter
Assignee (at issue)
Tyler Refrigeration Corporation
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.